Hallux Valgus Bone Guidance System for Sesamoid Alignment
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Solution Overview
Problem
Current surgical methods for correcting hallux valgus deformity, such as distal osteotomies of the first metatarsal, face challenges in accurately translating and rotating bone portions to properly align sesamoid bones during corrective surgery.
Innovation Solution
A guidance system comprising multiple guides that allow for the precise alignment, translation, and rotation of bone portions during surgery. The system includes a first guide detachably mounted to a bone portion, a second guide slidably translatable in a transverse direction, and a third guide selectively positionable along a curved path to rotate the bone portion to a target angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional surgical methods are used for distal osteotomy of the first metatarsal, then the surgery can be performed with simple tools, but the precision in translating and rotating bone portions is insufficient to properly align sesamoid bones
Solution Approach 1:
The guidance system is divided into multiple detachable components: a first guide detachably mounted to the bone, a second guide that can be attached to the first guide, and a third guide that can be attached to the second guide. This segmentation allows each component to perform a specific function (alignment, translation, rotation) while maintaining overall system precision without requiring a single complex monolithic device
Solution Approach 2:
The guidance system operates in multiple spatial dimensions: the first guide establishes longitudinal axis alignment, the second guide provides transverse direction translation, and the third guide enables rotational movement around the longitudinal axis. By distributing control across different dimensional movements, the system achieves precise three-dimensional bone portion positioning
2Manufacturing precision
If multiple guides are used to achieve precise bone alignment and rotation, then surgical precision is improved, but the ease of operation and surgical workflow is reduced
Solution Approach 1:
The guidance system incorporates dynamic, adjustable components rather than fixed rigid structures. The second guide is slidably translatable along the first guide, and the third guide is selectively positionable along a curved path, allowing the surgeon to adjust positions intraoperatively to achieve precise alignment while maintaining ease of adjustment through controlled mechanical movements
Solution Approach 2:
The guides are designed to be nested or hierarchically mounted: the second guide attaches to the first guide, and the third guide attaches to the second guide. This nesting arrangement allows the complex multi-functional system to be operated through a hierarchical sequence of simple attachment and adjustment actions, improving ease of operation
Data Source
AI summary
A guidance system comprises a first guide configured to be detachably mounted to a first portion of a bone. The first guide has a first axis for alignment with a longitudinal axis of the first portion of the bone. A second guide is mountable on the first guide. The second guide is slidably translatable in a transverse direction relative to the first axis. A third guide is mountable on the second guide. The third guide is selectively positionable along a curved path extending at least part way around the longitudinal axis.